import http from 'http';
import fs from 'fs/promises';
import url from 'url';
import path from 'path';

const __filename=url.fileURLToPath(import.meta.url);
const __dirname=path.dirname(__filename);
console.log(__dirname,__filename);

const PORT=process.env.PORT;


const server=http.createServer(async (req,res)=>{
try{   
    if(req.method==='GET'){
        let filePath;
        if(req.url=='/'){
            filePath=path.join(__dirname,'public','index.html')
        
        }else if(req.url=='/about'){
            filePath=path.join(__dirname,'public','about.html')
        }else{
            res.writeHead(405,{'Content-Type':'text/html;charset=utf-8'})
            res.end('<h1>页面未找到</h1>');
            return;
        }

        const data=await fs.readFile(filePath);
        res.setHeader('Content_Type','text/html;charset=utf-8');
        res.writeHead(200);
        res.end(data);
    }else{
        res.writeHead(420,{'Content-Type':'text/html;charset=utf-8'});
        res.end('<h1>非法请求</h1>');
    }  

} catch(error){
    console.error(error);
    res.writeHead(501,{'Content-Type':'text/html;charset=utf-8'});
    res.end('<h1>服务器错误</h1>')
}  
});

server.listen(PORT,()=>{
    console.log("服务器已启动,监听端口${PORT}");
})






    